Quote:
Originally Posted by bur****jp
It is more a matter of chemistry and thermodynamics than mechanics.
Most of the reason people go richer is to compensate for knock and then try to edge out more power. The power you make in that manner is fragile at best, and catastrophic at worst. Cars tuned this way are temperamental and unpredictable.
In this case conservative tuning isn't running richer, it's running MBT and the appropriate ignition timing to suit.
|
Really? You must be one of the only sources I've heard to tune like that. Purely tuning to 12.5:1 or leaner just to produce best AFR produced torque.
I'll also note here that finding MBT is actually done by changing ignition timing and not the AFR, not that AFR doesn't have an impact.
Why do you think that running slightly richer but with more timing makes it more fragile or temperamental? You could argue that running some of the AFR range you specified at high RPM would cause too much heat that could damage components and almost certainly would kill cats. Surely the answer is you want the ideal middle ground, not sticking to an AFR as not all engines or setups are that theoretically perfect
